X-Git-Url: https://git.saurik.com/redis.git/blobdiff_plain/2a200c784da1c7d33f72e3b92425f029214f70a1..faa2a80f89b5a3cd35812e71893d812e2877ed2e:/TODO

diff --git a/TODO b/TODO
index 7d91a103..dd6ba28b 100644
--- a/TODO
+++ b/TODO
@@ -1,36 +1,85 @@
-BETA 8 TODO
-- keys expire
-- sunion ssub
-- write integers in a special way on disk (and on memory?)
-- compact types for disk storing of short strings (no 4 bytes overhead!)
-- network layer stresser in test in demo
-- maxclients directive
-- check 'server.dirty' everywere
-- replication tests
-- command line client. If the last argument of a bulk command is missing get it from stdin. Example:
-    $ echo "bar" | redis-client SET foo
-    $ redis-client SET foo bar
-    $ redis-client GET foo
-    bar
-    $
-- Make Redis aware of the memory it is using thanks to getrusage() and report this info with the INFO command.
-- INFO command: clients, slave/master, requests/second in the last N seconds, memory usage, uptime, dirty, lastsave
-
-FUTURE
-
-ROLLBACK command:
-
-    ROLLBACK UNSET x
-    SET x 10
-    EXPIRE x 3600
-    COMMIT
-
-    (multiple rollbacks are allowed)
-
-    or alternatively
-
-    TRANSACTION SET x 1000
-    TRANSACTION EXPIRE x 1000
-    COMMIT
-
-    but this sucks since there is no way to check the error message.
+Redis TODO
+----------
+
+WARNING: are you a possible Redis contributor?
+         Before implementing what is listed what is listed in this file
+         please drop a message in the Redis google group or chat with
+         antirez or pietern on irc.freenode.org #redis to check if the work
+         is already in progress and if the feature is still interesting for
+         us, and *how* exactly this can be implemented to have good changes
+         of a merge. Otherwise it is probably wasted work! Thank you
+
+
+API CHANGES
+===========
+
+* Turn commands into variadic versions when it makes sense, that is, when
+  the variable number of arguments represent values, and there is no conflict
+  with the return value of the command.
+
+CLUSTER
+=======
+
+* Implement rehashing and cluster check in redis-trib.
+* Reimplement MIGRATE / RESTORE to use just in memory buffers (no disk at
+  all). This will require touching a lot of the RDB stuff around, but we may
+  hand with faster persistence for RDB.
+* Implement the slave nodes semantics and election.
+* Allow redis-trib to create a cluster-wide snapshot (using SYNC).
+* Allow redis-trib to restore a cluster-wide snapshot (implement UPLOAD?).
+
+APPEND ONLY FILE
+================
+
+* in AOF rewirte use HMSET to rewrite small hashes instead of multiple calls
+  to HSET.
+
+OPTIMIZATIONS
+=============
+
+* Avoid COW due to incrementing the dict iterators counter.
+* SORT: Don't copy the list into a vector when BY argument is constant.
+* Write the hash table size of every db in the dump, so that Redis can resize the hash table just one time when loading a big DB.
+* Read-only mode for slaves.
+* Redis big lists as linked lists of small ziplists?
+  Possibly a simple heuristic that join near nodes when some node gets smaller than the low_level, and split it into two if gets bigger than high_level.
+
+REPORTING
+=========
+
+* Better INFO output with sections.
+
+RANDOM
+======
+
+* Clients should be closed as far as the output buffer list is bigger than a given number of elements (configurable in redis.conf)
+* Should the redis default configuration, and the default redis.conf, just bind 127.0.0.1?
+
+KNOWN BUGS
+==========
+
+* What happens in the following scenario:
+    1) We are reading an AOF file.
+    2) SETEX FOO 5 BAR
+    3) APPEND FOO ZAP
+    What happens if between 1 and 2 for some reason (system under huge load
+    or alike) too many time passes? We should prevent expires while the
+    AOF is loading.
+* #519: Slave may have expired keys that were never read in the master (so a DEL
+  is not sent in the replication channel) but are already expired since
+  a lot of time. Maybe after a given delay that is undoubltly greater than
+  the replication link latency we should expire this key on the slave on
+  access?
+
+DISKSTORE TODO
+==============
+
+* Fix FLUSHALL/FLUSHDB: the queue of pending reads/writes should be handled.
+* Check that 00/00 and ff/ff exist at startup, otherwise exit with error.
+* Implement sync flush option, where data is written synchronously on disk when a command is executed.
+* Implement MULTI/EXEC as transaction abstract API to diskstore.c, with transaction_start, transaction_end, and a journal to recover.
+* Stop BGSAVE thread on shutdown and any other condition where the child is killed during normal bgsave.
+* Fix RANDOMKEY to really do something interesting
+* Fix DBSIZE to really do something interesting
+* Add a DEBUG command to check if an entry is or not in memory currently
+* dscache.c near 236, kobj = createStringObject... we could use static obj.